Adprep /forestprep Windows Server 2008


I have a Windows Small Business Server 2008 Std as my domain controller and I want to add my Windows Server 2008 Std as a backup domain controller. I have run the dcpromo and I am now being asked..

"To install a domain controller into this Active Directory Forest you must first prepare the forest using "adprep /forestprep". The adprep utility is available on the Windows Server 2008 R2 installation media in the \support\adprep folder"

My questions are as follows:

1. Do I run adprep /forest prep on my DC or on the machine I am adding as a backup domain controller?

2. Is running this likely to screw up my current DC?

3. I am working remotely and was hoping to just have to copy the \support\adprep directory via VPN then run it from the required server? will this work or does is use anything else off the install Disk?

Any help would be greatly appreceiated

Who is Participating?
Sarang TinguriaConnect With a Mentor Sr EngineerCommented:
Take backup of existing server because its a critical change...

This is standard message when you add 2008 R2 system to 2008 domain
This error comes because the schema versions are different in 2008 and 2008 R2
Schema version is 47 in  Windows Server 2008 R2 (release 2)
Schema version is 44  in Windows Server 2008

To see the how this goes refer below link this links shows for 2003 but the proceduere us same for 2008 source too
Sylvie BDirectorCommented:
Installing a DC should be just like installing any other DC to any domain..adprep shouldnt be needed
Cliff GaliherConnect With a Mentor Commented:
1) You run it on the DC.
2) It is not likely, but you should still have a backup.
3) Copying that folder should work. It basically includes the executable, which is self-contained (no dependencies) and the actual schema update files.

Regarding smithandandersen's reply, adprep is required if adding a 2008 R2 domain controller to an SBS 2008 domain. And while the question does say 2008, one of the tags is 2008 R2 and the error s/he posted also mentions the 2008 R2 media. So one can safely infer that the OP is trying to promote a 2008 R2 machine as a domain controller. That will, indeed, require a schema update, hence adprep.

wifiitAuthor Commented:
Thanks for all your input, does this update require a restart?
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